““Genes are merely codes. They act as a set of rules and as a biological template for the synthesis of the proteins that give each particular cell its characteristic structure and functions. They are, as it were, alive and dynamic architectural and mechanical plans. Whether the plan becomes realized depends on far more than the gene itself. Genes exist and function in the context of living organisms. The activities of cells are defined not simply by the genes in their nuclei but by the requirements of the entire organism — and by the interaction of that organism with the environment in which it must survive. Genes are turned on or off by the environment. For this reason, the greatest influences on human development, health and behaviour are those of the nurturing environment. Hardly anyone who raises plants or animals would ever dispute the primary role of early care in shaping how genetic endowment and potential will unfold. For reasons that have little to do with science, many people have difficulty grasping the same concept when it comes to the development of human beings. This paralysis of thought is all the more ironic, since of all animal species it is the human whose long-term functioning is most profoundly regulated by the early environment. Given the paucity of evidence for any decisive role of genetic factors in most questions of illness and health, why all the hoopla about the genome project? Why the pervasive genetic fundamentalism? We are social beings, and science, like all disciplines, has its ideological and political dimensions. As Hans Selye pointed out, the unacknowledged assumptions of the scientist will often limit and define what will be discovered. Settling for the view that illnesses, mental or physical, are primarily genetic allows us to avoid disturbing questions about the nature of the society in which we live. If “science” enables us to ignore poverty or man-made toxins or a frenetic and stressful social culture as contributors to disease, we can look only to simple answers: pharmacological and biological. Such an approach helps to justify and preserve prevailing social values and structures. It may also be profitable.””
